What is Melanotan II the drug that the TGA urges consumers to avoid? Melanotan II stimulates melanin production giving you a tan without UV exposure. The appeal: Tanning without sunburn risk Appetite suppression (side effect) Increased libido (side effect) Works Your body already makes a hormone that tells your skin to tan. Melanotan 2 is a synthetic peptide engineered to mimic that hormone but in a version that's more potent and Melanotan II Peptide: Tanning, Immunity, and Metabolic Support Revolution Health & Wellness